Maalikalvon

Maalikalvon is a term used in Finnish coatings science and conservation to denote the completed paint film that remains on a prepared surface after application and drying. The word combines maali ('paint') and kalvo ('film'), underscoring the concept of a continuous, cohesive layer formed by the binder and pigments.

In practical terms, maalikalvon refers to the thin, protective or decorative layer that results when paint cures. Its thickness typically ranges from a few micrometers in varnishes and sealants to several tens of micrometers in architectural and automotive coatings.

It comprises a binder (resin or polymer), pigments, solvents or water, and additives that control flow, drying, UV resistance, and stability. The film forms as the solvent evaporates and the binder coalesces or cures, yielding a continuous, adherent layer.

Key properties of a maalikalvon include adhesion to the substrate, hardness, flexibility, chemical and UV resistance, and gloss or satin finish. Its performance depends on formulation, surface preparation, and application conditions.

Applications span interior and exterior architectural coatings, wood finishes, metal protection, and art conservation where a varnish film is analyzed as maalikalvon. In conservation, the film is studied to assess aging and to guide cleaning or retouching.

Conservation and aging: the maalikalvon can degrade under UV light, heat, moisture, or abrasion, leading to cracking, peeling, whitening or yellowing. Proper maintenance, removal or retention in accordance with conservation ethics is important.